<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>timer button</title>
  <link rel="stylesheet" href="./timer-button.css" >
</head>
<body>
  <input type="button" id="add" value="input">
  <div id="test"></div>
  <script src="//apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
  <script src="./timer-button.js"></script>
  <script>
    $(() => {
      $timerBtn.show('#test')
    })
  </script>
</body>
</html>
